Low-mercury catalyst used for synthesizing vinyl chloride

A low-mercury catalyst and vinyl chloride technology, which is applied in the direction of physical/chemical process catalysts, hydrogen halide addition preparation, chemical instruments and methods, etc., can solve the problems of catalyst activity and stability reduction, environmental pollution, high consumption of mercury chloride, etc. problem, to achieve high catalytic activity and stability
CN102962082AInactive Publication Date: 2013-03-13DALIAN RES & DESIGN INST OF CHEM IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DALIAN RES & DESIGN INST OF CHEM IND
Publication Date
2013-03-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a low-mercury catalyst used for synthesizing vinyl chloride. The low-mercury catalyst takes mercuric chloride as a main active component, one or more of precious metals such as Au, Pd, Pt, Ru, Rh, Os and Ir salts or complexes thereof as active regulators, and one or more of potassium chloride, ferric chloride, zinc chloride and copper chloride as cocatalysts. By adding trace amount of precious metal salt into the mercuric chloride, the low-mercury catalyst forms a stable composite metal compound, plays a role in fixing and activating mercuric chloride, and still maintains very high catalytic activity and stability when the load capacity of the mercuric chloride is reduced to 0.1-2%.
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Description

[0001] technical field

[0002] The invention belongs to the technical field of catalysts, in particular to a low-mercury catalyst for synthesizing vinyl chloride.

[0003] Background technique

[0004] Vinyl chloride is an important raw material for organic synthesis, and its main use is to produce polyvinyl chloride. At present, there are two main methods for the synthesis of vinyl chloride: the acetylene method and the ethylene method. At present, most vinyl chloride monomers in my country are mainly produced by the acetylene process.

[0005] At present, the acetylene method of vinyl chloride mostly uses activated carbon-loaded mercuric chloride as a catalyst in a fixed-bed reactor, and the mercuric chloride loading is 10.5% to 12.5%. This kind of catalyst has a high mercury content, and its stability is very poor, it is easy to sublimate and lose, and its catalytic performance decays quickly. With the depletion of mercury resources in my country and the world's emph...

Claims

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